Where can I find Cornstarch in Gappenach?

Cornstarch can also be found in these cities:

Andernach Boppard Cochem Kobern-Gondorf Koblenz Lahnstein Mülheim-Kärlich Münstermaifeld Neuwied Nickenich Plaidt Treis-Karden Waldesch Weißenthurm

You can also find this in Gappenach:

Rice Pudding Baking Powder Spelt Bread Nut Nougat Cream Balsamic Vinegar Pork Spice Blends Potato Products Rye Roll Canned Tomatoes